debut01

.idea/vcs.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="" vcs="Git" />
   </component>
 </project>
\ No newline at end of file

tp1/Grade.java

@@ -28,6 +28,7 @@ public class Grade {
    */
 
   public double getValue() {
+    return value;
   }
 
   /**
@@ -36,6 +37,7 @@ public class Grade {
    */
   @Override
   public String toString() {
+    return (value+"/20");
   }
 
   /**
@@ -46,6 +48,10 @@ public class Grade {
    * @return a grade corresponding to the mean of grade in {@code grades}
    */
   public static Grade averageGrade(List<Grade> grades){
+    double cumul=0.0;
+    for (Grade grade : grades){
+      cumul += grade.getValue();
+    }return new Grade (cumul/grades.size());
   }
 
   /**